Vancouver ( van-KOO-vər) is a city in Clark County, Washington, United States, located on the north bank of the Columbia River. It had a population of 190,915 at the 2020 census, making it the fourth-most populous city in Washington. Founded in 1825 and incorporated in 1857, the city was originally established around Fort Vancouver, a fur trading outpost, and is situated directly north of Portland, Oregon, along the Washington–Oregon state line. Vancouver serves as the county seat of Clark County and is part of the Portland metropolitan area.